the anterior group of air cells of the ethmoidal sinus’s; each sinus communicates with the middle meatus of the nasal cavity. Syn: sinus ethmoidales anteriores [NA], anterior cells, anterior sinuses, cellulae anteriores.
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the anterior group of air cells of the ethmoidal sinus’s; each sinus communicates with the middle meatus of the nasal cavity. Syn: sinus ethmoidales anteriores [NA], anterior cells, anterior sinuses, cellulae anteriores.